Add missing entry for pif ("protection information format").
Protection information size can be 8 or 16 bytes, Update the pil entry
as per the NVM command set specification.

Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
---
 docs/system/devices/nvme.rst | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/docs/system/devices/nvme.rst b/docs/system/devices/nvme.rst
index 2a3af268f7..30d46d9338 100644
--- a/docs/system/devices/nvme.rst
+++ b/docs/system/devices/nvme.rst
@@ -271,9 +271,13 @@ The virtual namespace device supports DIF- and DIX-based protection information
 
 ``pil=UINT8`` (default: ``0``)
   Controls the location of the protection information within the metadata. Set
-  to ``1`` to transfer protection information as the first eight bytes of
-  metadata. Otherwise, the protection information is transferred as the last
-  eight bytes.
+  to ``1`` to transfer protection information as the first bytes of metadata.
+  Otherwise, the protection information is transferred as the last bytes of
+  metadata.
+
+``pif=UINT8`` (default: ``0``)
+  By default, the namespace device uses 16 bit guard protection information
+  format. Set to ``2`` to enable 64 bit guard protection information format.
 
 Virtualization Enhancements and SR-IOV (Experimental Support)
 -------------------------------------------------------------
-- 
2.25.1

On Aug  8 02:57, Ankit Kumar wrote:
> Add missing entry for pif ("protection information format").
> Protection information size can be 8 or 16 bytes, Update the pil entry
> as per the NVM command set specification.
> 
> Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
> ---
>  docs/system/devices/nvme.rst | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/docs/system/devices/nvme.rst b/docs/system/devices/nvme.rst
> index 2a3af268f7..30d46d9338 100644
> --- a/docs/system/devices/nvme.rst
> +++ b/docs/system/devices/nvme.rst
> @@ -271,9 +271,13 @@ The virtual namespace device supports DIF- and DIX-based protection information
>  
>  ``pil=UINT8`` (default: ``0``)
>    Controls the location of the protection information within the metadata. Set
> -  to ``1`` to transfer protection information as the first eight bytes of
> -  metadata. Otherwise, the protection information is transferred as the last
> -  eight bytes.
> +  to ``1`` to transfer protection information as the first bytes of metadata.
> +  Otherwise, the protection information is transferred as the last bytes of
> +  metadata.
> +
> +``pif=UINT8`` (default: ``0``)
> +  By default, the namespace device uses 16 bit guard protection information
> +  format. Set to ``2`` to enable 64 bit guard protection information format.
>  

I'll add a small note that pif=1 (32b guard) is not supported.

Thanks,

Reviewed-by: Klaus Jensen <k.jensen@samsung.com>